Read this and tell me what you think...you don't really have to tell me what you think....;) I'm guessing again here.....
https://www.backyardchickens.com/articles/vent-gleet-aka-nasty-chicken-butt.64647/
Yes...you can bring JUST some fresh poop into the vet's office to be tested for worms.
Most of the time you will never see worms even when they are infected with them.
(hence the poop test at the vet)
Sometimes only the already "weak" ones are the ones that can't naturally (how ever they do...
Trash the DE..it will do more harm than good.
Even though you have not seen worms she may never have gotten rid of them from the first time.
My guess would be the worms are/have been eating all her good nutrition.
Can you take some fresh poop back to the vet tomorrow morning?
She must have...
Welcome to BYC.
I am sorry she is not feeling so well.
Couple of questions.
The first time you treated for worms..did you treat the whole flock?
Did the vet tell you to treat for 5 straight days?
Are you dosing them straight to the beak?
DE will not get rid of mites. It is best to stick...